The 2x2 jumper issue is cause by some weird part of LDD that doesn't let stud connections and rod connections coexist. I've run into this problem before with other parts. You can remedy this by just moving the bar up slightly so that it doesn't touch the hollow stud of the jumper plate.

aoffan23 wrote:The 2x2 jumper issue is cause by some weird part of LDD that doesn't let stud connections and rod connections coexist. I've run into this problem before with other parts. You can remedy this by just moving the bar up slightly so that it doesn't touch the hollow stud of the jumper plate.